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Anterior dorsal ventricular ridge in the lizard: Embryonic development
C Yanes1, M A Perez Batista1, J M Martin Trujillo1
1Departamento de Citología-Histología, Facultad de Biología, Universidad de la Laguna, Tenerife.
Journal of Morphology
|June 15, 2018
Summary
The anterior dorsal ventricular ridge (ADVR) in lacertids develops rapidly, showing early neuronal differentiation, myelination, and synaptic formation. This region exhibits faster development than other striatal nuclei throughout embryonic stages.
Area of Science:
- Neuroscience
- Developmental Biology
- Comparative Anatomy
Background:
- The telencephalic vesicle in lacertids begins development at embryonic stage E=30.
- Early development features a homogeneous nucleated zone without distinct ventricular territories.
Purpose of the Study:
- To describe the developmental timeline and cellular differentiation of the anterior dorsal ventricular ridge (ADVR) in lacertids.
- To compare the developmental rate of the ADVR with other striatal nuclei.
Main Methods:
- Histological and ultrastructural analysis of lacertid embryos at various developmental stages (E=30-hatching).
- Observation of cellular morphology, proliferation zones, neuronal maturation, myelination, vascularization, and synaptic contacts.
Main Results:
- The anterior dorsal ventricular ridge (ADVR) emerges at E=32, with distinct proliferative zones.
- Neuronal degeneration is observed from E=34 until hatching, followed by organelle development and neuropile growth.
- Myelination and vascularization are initiated in the ADVR between E=38-E=40.
- Synaptic contacts appear by E=38, and the ADVR differentiates faster than other striatal nuclei from E=40 onwards.
Conclusions:
- The ADVR undergoes rapid and distinct developmental processes in lacertids.
- The ADVR's accelerated differentiation suggests a specialized role compared to other striatal regions.
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